Effects of isospin and momentum dependent interactions on liquid-gas phase transition in hot asymmetric nuclear matter
arXiv:nucl-th/0702085 · doi:10.1016/j.physletb.2007.05.035
Abstract
The liquid-gas phase transition in hot neutron-rich nuclear matter is investigated within a self-consistent thermal model using an isospin and momentum dependent interaction (MDI) constrained by the isospin diffusion data in heavy-ion collisions, a momentum-independent interaction (MID), and an isoscalar momentum-dependent interaction (eMDYI). The boundary of the phase-coexistence region is shown to be sensitive to the density dependence of the nuclear symmetry energy with a softer symmetry energy giving a higher critical pressure and a larger area of phase-coexistence region. Compared with the momentum-independent MID interaction, the isospin and momentum-dependent MDI interaction is found to increase the critical pressure and enlarge the area of phase-coexistence region. For the isoscalar momentum-dependent eMDYI interaction, a limiting pressure above which the liquid-gas phase transition cannot take place has been found and it is shown to be sensitive to the stiffness of the symmetry energy.
6 pages, 4 figures, revised version, to appear in PLB
References in corpus (3)
- Temperature effects on the nuclear symmetry energy and symmetry free energy with an isospin and momentum dependent interaction
- Double neutron-proton differential transverse flow as a probe for the high-density behavior of the nuclear symmetry energy
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- Neutron Stars and Gravitational Waves: the Key Role of Nuclear Equation of State
- Nuclear Chemical and Mechanical Instability and the Liquid-Gas Phase Transition in Nuclei
- Disentangling effects of collision geometry and symmetry energy in U+U collisions
- Equation of State of Hot Neutron Star Matter using Finite Range Simple Effective Interaction
- Elimination of influence of neutron-skin size difference of initial colliding nuclei in Pb+Pb collisions
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